Figure 1From: Age-dependent patterns of bovine tuberculosis in cattleDemographics of the cattle population in Great Britain. a) Population pyramids for dairy and beef cattle in Great Britain. The distributions were calculated using the Cattle Tracing System on 01-01-2009. b) Unadjusted age-specific reactor numbers for 2009 for dairy and beef cattle in Great Britain, calculated from the VetNet database.Back to article page